just finished scratching my head for the past few hours, and wanted to post here in case others run into this issue.
I turned off the purchase order module and unknowingly it made the purchase price in the product section disappear. I couldnt figure it out for ages, support mentioned it was a 3rd party plugin conflicting with their plugin which it wasnt, because i ran a staging site and deactviated and reactived all plugins and still no luck.
The solution is to leave the purchase order module turned on otherwise you will not be able to manipulate the purchase price!
Just wanted to post it here in case others ran into this weird problem. Not sure if its intended or a bug.
